从抗震防灾角度，下列表述中正确的是（）。 A.疏散通道的选择应该保证两侧没有建筑物

“先将总体的观察单位按一定的顺序分成若干部分，再按照一定的顺序，每间隔一定数量的单位抽取一个单位进入样本。”此种抽样方法属于（）

A.随机抽样

B.系统抽样

C.分层抽样

D.整群抽样

E.方便抽样

某学生的化学实验报告中，有以下实验数据，其中不合理的是（　　）

A．用托盘天平称取11.7g氧化铜粉末

B．用10mL量筒量取5.26mL盐酸

C．温度计上显示的室温读数为25.7℃

D．用广泛pH试纸测得溶液的pH为10.5

《中华人民共和国铁路法》规定：铁路的标准轨距为（）。

A、1000mm

B、1345mm

C、1435mm

D、1543mm

对于期货交易中仓单注册人注册货物时发生升水的，该仓单注销(即提取货物退出期货流通)时，正确的处理是( )。

A．注册人应当就升水部分款项向注销人开具负数增值税专用发票，同时冲减销项税额

B．注销人凭取得的专用发票调减进项税额

C．不得由仓单注销人向仓单注册人开具增值税专用发票

D．注册人应当就升水部分款项向注销人开具增值税专用发票，同时计提销项税额，注销人凭取得的专用发票计算抵扣进项税额

Selection to participate in a top executive-education program is an important rung on the ladder to top corporate jobs. U. S. corporations (1) billions of dollars in this form of management development -- and use it to (2) and train fast-track managers. Yet one (3) of executive education found that less than 5% of the managers (4) to these high-profile programs are women -- and minorities are terribly (5) as well.

The numbers are (6) . In regular business (7) usually paid for by the participant, not an employer -- there are plenty of women and minorities. Women, for example, (8) for about 30% of MBA candidates. Yet in the (9) programs paid for by corporations that round out a manager’s credentials at a (10) career point, usually at age 40 or 45, companies are making only a (11) investment in developing female and minority executives. A case (12) point: Only about 30% of the 180 executives in Stanford’s recent (13) management program were women.

Most companies say these days they are (14) hiring and promoting women and minorities-- and there are some (15) trends in overall employment and pay levels so why are companies (16) the ball when it (17) executive education The schools (18) that they are neither the cause of nor the cure for the problem. A Harvard Business School dean figures that companies are (19) of sending their female executives (20) they don’t want to lose them to competitors.

19（）

A.shy

B.coward

C.brave

D.fearful